Sign in

Nicolás Sánchez-Fuenzalida

@n41c0.bsky.social
444 followers 147 following 68 posts

Postdoc at the Translational Psychiatry Lab Universitären Psychiatrischen Kliniken (UPK) Basel nik0lai.github.io

PostsRepliesMedia
Nicolás Sánchez-Fuenzalida @n41c0.bsky.social · 10/09/2026
🔊 dear BSKY people, I'm looking for a chatter, blabber, cocktail party background audio generator that has hopefully been used for research before. any tip or recommendation is appreciated. reposts are also appreciated as they may bring this post closer to someone that knows 🙌
046
Reposted by Nicolás Sánchez-Fuenzalida
Matan Mazor @matanmazor.bsky.social · 08/09/2026
spawn-again.vercel.app
spawn-again.vercel.app
The Lottery of Life
Spawn as a random animal, at the real odds of who is actually born on Earth each year. Almost no one draws a human. The odds are real.
172
Reposted by Nicolás Sánchez-Fuenzalida
Lucca Jaeckel @luccen.bsky.social · 07/09/2026
Excited to share the first publication from my PhD project: how does low-dose LSD (10 and 20 µg) affect visual perception🧠 In 30 healthy volunteers (within-subject crossover) we assessed visual perception using visual contrast surround suppression (psychophysics), and subjectively (questionnaires).
153
Reposted by Nicolás Sánchez-Fuenzalida
Nicolás Sánchez-Fuenzalida @n41c0.bsky.social · 21/07/2026
well on time for my bi-yearly post I'm sharing the final version of this very cool work we started with @cjungerius.bsky.social @smfleming.bsky.social @svangaal.bsky.social @fahrenfort.bsky.social in 2021, when I was young and full of hope. Now out in @natcomms.nature.com 1/11
nature.com
The act of detecting a stimulus contaminates measures of conscious experience with decision biases - Nature Communications
A central challenge in consciousness research is determining whether people truly experience a stimulus. Here, the authors show that context biases traditional detection measures, whereas continuous r...
35224
Nicolás Sánchez-Fuenzalida @n41c0.bsky.social · 31/08/2026
now out at @nconsc.bsky.social 🥳
083
Nicolás Sánchez-Fuenzalida @n41c0.bsky.social · 28/08/2026
While our findings offer convincing evidence for unconscious priming at the single-subject level based on proper statistical procedures, our study also emphasises the importance of providing clear instructions and sufficient training to appropriately assess awareness. 8/8
031
Nicolás Sánchez-Fuenzalida @n41c0.bsky.social · 28/08/2026
We also tested the reliability of the prime awareness measure as well as the association strength between the raw and transformed priming RT values, but you will have to read the paper to check those 😀 7/8
120
Nicolás Sánchez-Fuenzalida @n41c0.bsky.social · 28/08/2026
When directly comparing prime and mask discrimination, we found an indirect task advantage in the same three participants for whom we showed unc. priming using the double t-test approach. 6/8
120
Nicolás Sánchez-Fuenzalida @n41c0.bsky.social · 28/08/2026
Because the double t-test approach is inherently wrong, using the median-split technique, we recoded the mask discrimination (indirect task) reaction times into accuracy to directly compare them with prime discrimination responses (direct task). 5/8
120
Nicolás Sánchez-Fuenzalida @n41c0.bsky.social · 28/08/2026
Even after training, some SOAs still showed chance prime discrimination (although not in all SOAs, as in Vorberg et al.). Using the double t-test approach, as in Vorberg et al. (2003), we established unconscious priming in at least one SOA for 3 participants. 5/8
120
Nicolás Sánchez-Fuenzalida @n41c0.bsky.social · 28/08/2026
Unlike in Vorberg et al., some participants could already discriminate the prime at longer SOAs even before training. In the priming task, however, we mostly replicated Vorberg’s main pattern of results. 4/8
120
Nicolás Sánchez-Fuenzalida @n41c0.bsky.social · 28/08/2026
In our version of this classic experiment we tackled common issues in unc. priming research: reliance on a non-significant p-value to claim no awareness, lack of direct comparison between awareness and priming, and insufficient training for participants. 3/8
120
Nicolás Sánchez-Fuenzalida @n41c0.bsky.social · 28/08/2026
In Vorberg et al. (2003), participants were slower to respond to an arrow-shaped mask when it followed an arrow-shaped prime pointing in the opposite direction, despite participants not being aware of the prime. Or they were faster if both prime and mask were pointing in the same direction. 2/8
120
Nicolás Sánchez-Fuenzalida @n41c0.bsky.social · 28/08/2026
🙌🍾🎉 new paper w/ @svangaal.bsky.social, Z. van den Hurk @timostein.bsky.social & @fahrenfort.bsky.social where we attempted to replicate a classical unconscious priming study by Vorberg et al. (2003) using an improved single-subject Bayesian approach. 1/8
academic.oup.com
Evidence for unconscious priming using a Bayesian single-subject approach
Abstract. Many studies have claimed the existence of unconscious priming, but a valid statistical procedure for substantiating such claims is often lacking
1157
Nicolás Sánchez-Fuenzalida @n41c0.bsky.social · 21/07/2026
If you made it this far, you should probably read the paper, as it does a better job of explaining our findings than this Bluesky thread. 11/11 www.nature.com/articles/s41...
nature.com
The act of detecting a stimulus contaminates measures of conscious experience with decision biases - Nature Communications
A central challenge in consciousness research is determining whether people truly experience a stimulus. Here, the authors show that context biases traditional detection measures, whereas continuous r...
150
Nicolás Sánchez-Fuenzalida @n41c0.bsky.social · 21/07/2026
So: attentional cues change appearance. Base rate and payoff change your decisions. And just having a present/absent context is enough for decision bias to creep into non-detection measures. 10/11
140
Nicolás Sánchez-Fuenzalida @n41c0.bsky.social · 21/07/2026
Finally, we ran an extra experiment where we entirely removed the detection component from the setup and show that the base rate effect disappears, whereas the attention effect remained. 9/11
120
Nicolás Sánchez-Fuenzalida @n41c0.bsky.social · 21/07/2026
So we fit a Hurdle-Gaussian model that allows us to separate the decision and the perceived contrast components that inform reproduction responses. Attention moved the contrast. Base rate and payoff mostly moved the hurdle (decision). These results were replicated in a new sample. 8/11
120
Nicolás Sánchez-Fuenzalida @n41c0.bsky.social · 21/07/2026
When looking deeper, we figured that reproduction responses are the combination of how often people set the patch to zero (saw nothing), and how bright they set it when they do see something. Very different mixes of the two give you the exact same average. 7/11
120
Nicolás Sánchez-Fuenzalida @n41c0.bsky.social · 21/07/2026
Our suspicion came from our previous work where statistical priors and reward structures did not influence reproduction in a discrimination setup. 6/11
pnas.org
Predictions and rewards affect decision-making but not subjective experience | PNAS
To survive, organisms constantly make decisions to avoid danger and maximize rewards in information-rich environments. As a result, decisions about...
140
Nicolás Sánchez-Fuenzalida @n41c0.bsky.social · 21/07/2026
Interestingly, reproduced contrast went up under all three as well. Taken at face value that would mean statistical priors and reward structures literally change what you consciously see. We were suspicious. 5/11
130
Nicolás Sánchez-Fuenzalida @n41c0.bsky.social · 21/07/2026
We pushed people toward "present" responses in three ways: an attentional cue, an asymmetrical base rate (90% of trials had a target), and a payoff where misses cost 5x more than false alarms. All three biased detection responses. 4/11
120
Nicolás Sánchez-Fuenzalida @n41c0.bsky.social · 21/07/2026
Across three experiments, we asked 505 participants to detect very dim Gabor patches, sometimes present, sometimes not, or to reproduce what they saw by adjusting the patch's contrast. Crucially, participants did not know which task they were doing until after the stimulus was gone. 3/11
130
Nicolás Sánchez-Fuenzalida @n41c0.bsky.social · 21/07/2026
If you pay someone for spotting a faint light, they report seeing it more often, but do they actually see more, or just press the button more? In a survey, most consciousness researchers said the participants were not seeing the light more often. 2/11
academic.oup.com
An academic survey on theoretical foundations, common assumptions and the current state of consciousness science
Abstract. We report the results of an academic survey into the theoretical and methodological foundations, common assumptions, and the current state of the
130
Nicolás Sánchez-Fuenzalida @n41c0.bsky.social · 21/07/2026
well on time for my bi-yearly post I'm sharing the final version of this very cool work we started with @cjungerius.bsky.social @smfleming.bsky.social @svangaal.bsky.social @fahrenfort.bsky.social in 2021, when I was young and full of hope. Now out in @natcomms.nature.com 1/11
nature.com
The act of detecting a stimulus contaminates measures of conscious experience with decision biases - Nature Communications
A central challenge in consciousness research is determining whether people truly experience a stimulus. Here, the authors show that context biases traditional detection measures, whereas continuous r...
35224
Nicolás Sánchez-Fuenzalida @n41c0.bsky.social · 16/07/2026
congratulations!! 🎉 so well deserved!
200
Reposted by Nicolás Sánchez-Fuenzalida
Frederik Aust @frederikaust.com · 23/06/2026
Have you used Bayes factor to test point-null hypotheses in Hierarchical models and wondered: 1. Bridge sampling (BS) or Savage-Dickey density ratio (SDDR)? 2. If SDDR, which density estimation method? 3. How many MCMC samples? 4. What's the cost-benefit trade-off? This may be of interest to you.
42012
Reposted by Nicolás Sánchez-Fuenzalida
Nicolás Sánchez-Fuenzalida @n41c0.bsky.social · 04/06/2026
my last PhD chapter is finally out 🪅🥳 (although not nicely formatted yet). it's very easy to introduce detection biases in otherwise appearance based tasks. A more digested thread coming later. w/ @cjungerius.bsky.social @smfleming.bsky.social @svangaal.bsky.social @fahrenfort.bsky.social
nature.com
The act of detecting a stimulus contaminates measures of conscious experience with decision biases - Nature Communications
A central challenge in consciousness research is determining whether people truly experience a stimulus. Here, the authors show that context biases traditional detection measures, whereas continuous r...
1185
Reposted by Nicolás Sánchez-Fuenzalida
Laurens @laurenshof.online · 08/06/2026
@proton.me is actively partnering with the far right www.reddit.com/r/degoogle/c...
reddit.com
From the degoogle community on Reddit: Proton is funding the French far right on YouTube
Explore this post and more from the degoogle community
31184108
Nicolás Sánchez-Fuenzalida @n41c0.bsky.social · 05/06/2026
thank you so much!
000
Nicolás Sánchez-Fuenzalida @n41c0.bsky.social · 04/06/2026
my last PhD chapter is finally out 🪅🥳 (although not nicely formatted yet). it's very easy to introduce detection biases in otherwise appearance based tasks. A more digested thread coming later. w/ @cjungerius.bsky.social @smfleming.bsky.social @svangaal.bsky.social @fahrenfort.bsky.social
nature.com
The act of detecting a stimulus contaminates measures of conscious experience with decision biases - Nature Communications
A central challenge in consciousness research is determining whether people truly experience a stimulus. Here, the authors show that context biases traditional detection measures, whereas continuous r...
1185
Reposted by Nicolás Sánchez-Fuenzalida
Johannes Fahrenfort @fahrenfort.bsky.social · 05/03/2026
I gave talk about subjective and objective approaches in the study of conscious perception last week in a BAMΞ workshop @uni-bamberg.de hosted by @johanneskleiner.bsky.social @jolienfrancken.bsky.social and @ronyhirsch.bsky.social. You can find the recording here: www.youtube.com/watch?v=S1zB...
youtube.com
Johannes Fahrenfort: Subjective and Objective Approaches in the Study of Conscious Perception
YouTube video by Mathematical Consciousness Science
184
Reposted by Nicolás Sánchez-Fuenzalida
Michael Pereira @meaperei.bsky.social · 24/02/2026
#hiring Come work with us to better understand the neuronal mechanism underlying perceptual consciousness! 18 months postdoctoral position at INSERM in Grenoble, France. ⌛Application deadline 10 March 2026. euraxess.ec.europa.eu/jobs/408445
euraxess.ec.europa.eu
Postdoctoral researcher on single neuron recordings for consciousness
Contract period: 18 monthsExpected date of employment: June 2026Proportion of work: Full timeSalary: according to INSERM scales (~2900 – 3300 € gross / month based on experience)Desired level of educa...
12924
Nicolás Sánchez-Fuenzalida @n41c0.bsky.social · 21/02/2026
thank you!! it was very unexpected
000
Nicolás Sánchez-Fuenzalida @n41c0.bsky.social · 21/02/2026
thank you!! hope to run into you in sometime
010
Nicolás Sánchez-Fuenzalida @n41c0.bsky.social · 20/02/2026
(a bit late but) i'm beyond happy (and in disbelief tbh) to share that i got a Marie Skłodowska-Curie Postdoc Fellowship to study hallucinations with @smfleming.bsky.social at @ucl.ac.uk!! 🙌🥳🪅 marie-sklodowska-curie-actions.ec.europa.eu/news/msca-aw...
marie-sklodowska-curie-actions.ec.europa.eu
MSCA awards €404.3 million to postdoctoral researchers
1610 outstanding postdoctoral researchers were selected for funding among 17,066 applicants.
2250
Nicolás Sánchez-Fuenzalida @n41c0.bsky.social · 07/11/2025
While our findings offer convincing evidence for unconscious priming at the single-subject level based on proper statistical procedures, our study also emphasises the importance of providing clear instructions and sufficient training to appropriately assess awareness.
020
Nicolás Sánchez-Fuenzalida @n41c0.bsky.social · 07/11/2025
When directly comparing prime and mask discrimination, we found an indirect task advantage in the same three participants for whom we showed unc. priming using the double t-test approach.
100
Nicolás Sánchez-Fuenzalida @n41c0.bsky.social · 07/11/2025
In this framework, unconscious processing occurs if there is an indirect task advantage (priming effect) over the direct task (prime discrimination), which would indicate the indirect task is capitalising on information that is otherwise not available consciously.
110
Nicolás Sánchez-Fuenzalida @n41c0.bsky.social · 07/11/2025
Because the double t-test approach is inherently wrong, using the median-split technique, we recoded the mask discrimination (indirect task) reaction times into accuracy to directly compare them with prime discrimination responses (direct task).
110
Nicolás Sánchez-Fuenzalida @n41c0.bsky.social · 07/11/2025
Even after training, some SOAs still showed chance prime discrimination (although not in all SOAs, as in Vorberg et al.). Using the double t-test approach, as in Vorberg et al. (2003), we established unconscious priming in at least one SOA for 3 participants.
120
Nicolás Sánchez-Fuenzalida @n41c0.bsky.social · 07/11/2025
Unlike in Vorberg et al., some participants could already discriminate the prime at longer SOAs even before training. In the priming task, however, we replicated Vorberg’s main pattern of results.
120
Nicolás Sánchez-Fuenzalida @n41c0.bsky.social · 07/11/2025
We tackled common issues in unc. priming research: reliance on a non-significant p-value to claim no awareness, lack of direct comparison between awareness and priming, and insufficient training for participants.
120
Nicolás Sánchez-Fuenzalida @n41c0.bsky.social · 07/11/2025
In Vorberg et al. (2003), participants were slower to respond to an arrow-shaped mask when it followed an arrow-shaped prime pointing in the opposite direction, despite participants not being aware of the prime. Or they were faster if both prime and mask were pointing in the same direction.
120
Nicolás Sánchez-Fuenzalida @n41c0.bsky.social · 07/11/2025
it is time to make my biyearly post because I put a preprint out🎉🍾😀. we (w/ @svangaal.bsky.social, Z. van den Hurk, @timostein.bsky.social & @fahrenfort.bsky.social) attempted to replicate a classic unconscious priming study by Vorberg et al. (2003) using a single-subject Bayesian approach.
osf.io
OSF
1103
Reposted by Nicolás Sánchez-Fuenzalida
Johannes Fahrenfort @fahrenfort.bsky.social · 17/10/2025
Pre-print 🎉 "Subjective and objective approaches in the study of conscious perception" will be a chapter in www.horizon-minds.com. We explain that subjective and objective are poorly defined constructs and provide a taxonomy. doi.org/10.31234/osf... with @svangaal.bsky.social @timostein.bsky.social
doi.org
OSF
0195
Nicolás Sánchez-Fuenzalida @n41c0.bsky.social · 09/07/2025
this is happening later today, drop by the unconscious processing session at 3.50 🌡️
080
Nicolás Sánchez-Fuenzalida @n41c0.bsky.social · 09/07/2025
thank you for fixing it so quickly, and also for having vegan food. I've been attending the conference for a while and it's the first time I'm not hungry all day 🫶
110
Nicolás Sánchez-Fuenzalida @n41c0.bsky.social · 09/07/2025
the answer is yes, but limited
010
Nicolás Sánchez-Fuenzalida @n41c0.bsky.social · 09/07/2025
metacontrast masking, as in Vorberg et al. (2003). Different time courses for visual perception and action priming
000